"We
would like to express our appreciation and thank the Hydro-Milling Group
for a job well done.

"HMG
(cleaned) the Turbine Steam piping in 8 and 9 power blocks. As a result of
HMG’s unique cleaning methods, we were able to greatly reduce our Air
and Steam Blow durations to achieve the desired piping cleanliness. Thanks
for your cooperation and timely efforts towards the overall completion
of the ... project."

The cleaning of steel,
plastic, graphite or concrete pipes is done with precisely controlled
rotation of the cleaning nozzle, which in turn is advanced at a
predetermined speed by the Hurricane Rotating system, providing a thorough and
even cleaning of the entire interior surface of the
pipe. Incrustations of all kinds - including tough, viscous,
brittle or extremely hard deposits - are easily removed (stripe free)
from the pipe wall, even from pipes that are totally blocked.

This proprietary pipe cleaning system is capable of
handling changes of direction, including multiple 90-degree turns (see
picture at right), and
pipe offsets to distances of 350 feet vertically or 1,250 feet
horizontally (or any combination) from the point of entry with precise tracking
capabilities.

Before
and after cleaning

Before
and after
cleaning

System
can change directions in multiple 90-degree turns

All
debris and mill scale removed from the pipe surface is transported out
of the pipe when the high-pressure nozzle is retracted. This is
accomplished via a pusher/flusher orifice built into the cleaning
nozzle, utilizing a typical working pressure of 12,000 PSI for mill
scale removal and an average water
flow of 40 GPM. All resulting debris and mill scale may be
contained and/or collected for proper disposal.

In addition, water
consumption can be greatly reduced via use of a specially designed
re-circulation system for all water not being consumed by the
high-pressure nozzle. This excess water is re-circulated to an onboard
suction stabilizer tank rather than being discharged to ground. This
"zero discharge" feature allows Hydro-Milling to provide reduced water
consumption as well as associated treatment disposal costs to its customers on many sites.

HMG’s
hydro milling process is very safe and effective. Even if a
hose or nozzle were to burst during the hydro milling operation, it
would present no hazard to either
personnel or pipeline. The high-pressure hose cannot be pushed out of
the pipe being cleaned once it is secured within the patented hose
feeder system, as this protective mechanism securely contains all hose
movement at the point of entry.

HMG’s
cleaning methods have been proven to reduce steam and air blow durations by
60-70% for customers who have utilized our services for pipe preparation
prior to steam blow. To take full advantage of our cleaning process, we
recommend hydro milling/lazing immediately after hydro testing and
prior to any proposed steam blows*. This combination will provide the
largest return for the client in both time and money.

*Even
though HMG’s cleaning process is very thorough, it cannot eliminate
steam blows from the pipe preparation process.